Which common issue may arise from improper fitting of an orthotic device?

Improper fitting of an orthotic device can lead to skin irritation and discomfort, which is a common issue experienced by users. When an orthotic does not fit properly, it may apply uneven pressure on the skin or rub against it, causing friction. This can result in redness, blistering, or even open sores, particularly in areas where the device makes contact with the skin. Additionally, an ill-fitting orthotic may alter the natural biomechanics of movement, leading to discomfort not only in the area where the device is worn but also in other parts of the body as compensation patterns may develop.

The other options highlight potential positive outcomes or irrelevant scenarios related to orthotic use. Increased mobility and improved muscle strength typically would occur with a properly fitted orthotic, as these devices are designed to support function and enhance physical performance, not hinder it. The option stating 'None of the above' indicates there are no issues with improper fitting, which is not the case as discomfort and skin issues are well-documented consequences of incorrect orthotic fitting. Thus, the focus on skin irritation and discomfort as a common issue underscores the importance of proper fitting and adjustment of orthotic devices for user comfort and effectiveness.